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ENGINE MANAGEMENT & FUEL INJECTION

Engine Management



Balance Motorsport are dealers for Jenvey Fuel Injection systems.ITB Fuel Injection represents the ultimate induction solution and really Carbs are a thing of a Fuel Injection past. Unless we are talking classics when only the best DCOEs or DHLAs will do... please read more or select using the sidebar. Jenvey Throttle Bodies, ECU's (Emerald and AEM) and also Throttle Body kits.

Please note we can also arrange remapping (chip tuning) via the OBD diagnostic port and on some trickier cars remap via chip removal / jump

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Engine Management - a basic guide With the advanced technology at our disposal nowadays carburettors are almost a thing of the past. Fuel injection comes in many shapes and sizes but in every case there is some form of computer deciding how much fuel to inject and when. It is the optimisation of this management combined with improvements in gas flow that to a large extent mean that a set of racing carburettors are no longer the favoured option.

The majority of production cars use some kind on plenum multipoint injection system. The plenum system allied to a single throttle body gives good mid range torque and low speed flexibility. They are usually well designed enough to enable a fair degree of tuning to release more power at the top end of the rev range. More often than not the biggest challenge is the current engine management system. If you have an airflow meter of some kind your computer will automatically provide more fuel in response to greater airflow. How much it can stand is the question. In Fuel Pumps we discussed fuel flow requirement. We know that the injectors will probably be able to flow up to 20% more fuel, so assuming we install other components (cylinder head, camshaft, exhaust) a 20% power gain keeping standard injection is probably realistic. You then reach a crossroads, either you can remap the existing system and stick with the plenum or you can replace the existing management and upgrade the injectors and keep the manifold. Some event regulations actually state the original induction system must be kept, but that the ECU can be changed. Approximately a 20-50% increase in power should be achievable with N.A engines and more with turbos keeping the existing manifold. Beyond this if your regulations allow throttle bodies are the way to go.
Throttle bodies are available in a number of shapes and sizes - Twin Bore Throttle bodies, Single Throttle bodies (with both taper and plain) - these offer better gas flow on engines where bore spacing does not suit the layout of a twin bore throttle body design.

Installation available. Price dependent on application.


Fuel Injection


Fuel Injection in one form another has been with us for a long time. It seems like only yesterday that I remember playground boasts of "my dads SRI will do 140 says so on the speedo", I also remember telling them why it wouldn't do that speed. In the early days mechanical injection was common - think Bosch K-Jetronic. Kugel Fischer was around earlier. Old Cosworth 4 cylinder race engines long before the DFV were on mechanical injection. Nowadays the biggest challenge is working with existing managment. Try to keep check lights out. Unless it's a race car of course and we can start from scratch. Then just when you think you are keeping up, along comes Direct instead of Port fuel injection. I saw some cam timing the other day that suggested that on a Direct injected turbo engine there was more lift at tdc on the exhaust than the inlet..

 As far as aftermarket throttle body injection goes we are still firmly in the world of port injection here! We want lots of lift at TDC and the ability to conjour up an orchestra on the loud pedal..

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  1. 3 BAR FUEL REGULATOR (fits into fuel rail)

    3 BAR FUEL REGULATOR (fits into fuel rail)

    Fuel Rails/Sensors/Injectors More
    Excl. Tax: £56.70 Incl. Tax: £68.04
  2. 45mm Single tapered T.Body, 1 inj, 4.5º taper

    45mm Single tapered T.Body, 1 inj, 4.5º taper

    SF - Single taper bore throttle bodies More
    Excl. Tax: £125.51 Incl. Tax: £150.61
  3. 45mm Single tapered T.Body, 2 inj, 4.5º taper

    45mm Single tapered T.Body, 2 inj, 4.5º taper

    SF - Single taper bore throttle bodies More
    Excl. Tax: £160.20 Incl. Tax: £192.24
  4. 45mm Single tapered T.Body, 4.5º deg taper

    45mm Single tapered T.Body, 4.5º deg taper

    SF - Single taper bore throttle bodies More
    Excl. Tax: £108.16 Incl. Tax: £129.79
  5. 48mm Single tapered T.Body, 1 inj, 4.5º taper

    48mm Single tapered T.Body, 1 inj, 4.5º taper

    SF - Single taper bore throttle bodies More
    Excl. Tax: £125.51 Incl. Tax: £150.61
  6. 48mm Single tapered T.Body, 2 inj, 4.5º taper

    48mm Single tapered T.Body, 2 inj, 4.5º taper

    SF - Single taper bore throttle bodies More
    Excl. Tax: £160.20 Incl. Tax: £192.24
  7. 48mm Single tapered T.Body, 4.5º deg taper

    48mm Single tapered T.Body, 4.5º deg taper

    SF - Single taper bore throttle bodies More
    Excl. Tax: £108.16 Incl. Tax: £129.79
  8. 51mm Single tapered T.Body, 1 inj, 4.5º taper

    51mm Single tapered T.Body, 1 inj, 4.5º taper

    SF - Single taper bore throttle bodies More
    Excl. Tax: £125.51 Incl. Tax: £150.61
  9. 51mm Single tapered T.Body, 2 inj, 4.5º taper

    51mm Single tapered T.Body, 2 inj, 4.5º taper

    SF - Single taper bore throttle bodies More
    Excl. Tax: £160.20 Incl. Tax: £192.24
  10. 51mm Single tapered T.Body, 4.5º deg taper

    51mm Single tapered T.Body, 4.5º deg taper

    SF - Single taper bore throttle bodies More
    Excl. Tax: £108.16 Incl. Tax: £129.79
  11. ABB2/50 Jenvey Air Filter Base Plate

    ABB2/50 Jenvey Air Filter Base Plate

    Jenvey Air Filter More
    Excl. Tax: £48.98 Incl. Tax: £58.78
  12. AEM PLUG AND PLAY ECU HONDA S2000

    AEM PLUG AND PLAY ECU HONDA S2000

    AEM Plug and Play ECU for Honda S2000

    More
    Excl. Tax: £1,079.00 Incl. Tax: £1,294.80

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